DISTRIBUTION COEFFICIENTS OF CD, CO, NI, AND ZN IN SOILS
DISTRIBUTION COEFFICIENTS OF CD, CO, NI, AND ZN IN SOILS
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DOI：
10.1111/j.1365-2389.1988.tb01190.x
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发表时间：
1988-03-01
期刊：
影响因子：
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通讯作者：
CHRISTENSEN, TH
中科院分区：
文献类型：
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作者：
ANDERSON, PR;CHRISTENSEN, TH
在 38 种不同的土壤中，使用低平衡浓度的 Cd (0.7-12.6 μg l-1)、Co (18-118 μg l-1)、Ni (22-330 μg l-1) 和 Zn (40-1480 μg l-1) 溶质混合物进行了批量吸附实验。统计相关性表明，土壤上的金属吸附受到粘土以及铁和锰的水合氧化物的影响。根据计算出的这些金属的分配系数，Co 通常在土壤中表现出最高的迁移率，但 Zn 的迁移率会随着 pH 值的降低而增加得更快。根据这些数据开发出两种类型的经验关系来估计分布系数的值。
Batch adsorption experiments were conducted with a mixture of solutes at low equilibrium concentrations of Cd (0.7-12.6 .mu.g l-1), Co (18-118 .mu.g l-1), Ni (22-330 .mu.g l-1), and Zn (40-1480 .mu.g l-1) in 38 different soils. Statistical correlations indicated that metal sorption onto the soils was influenced by the presence of clays and hydrous oxides of Fe and Mn. Based on calculated distribution coefficients for these metals, Co will generally exhibit the highest mobility in soils, but the mobility of Zn will increase faster with decreasing pH. Two types of empirical relationships are developed from these data to estimate values for the distribution coefficients.